/*
 * Copyright 2010-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.backend.jvm.intrinsics

import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
import org.jetbrains.kotlin.ir.expressions.IrMemberAccessExpression
import org.jetbrains.kotlin.resolve.descriptorUtil.module
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
import org.jetbrains.kotlin.types.Variance

class IsArrayOf : IntrinsicMethod() {
    override fun toCallable(expression: IrMemberAccessExpression, signature: JvmMethodSignature, context: JvmBackendContext): IrIntrinsicFunction {
        val typeMapper = context.state.typeMapper

        val descriptor = expression.descriptor
        val builtIns = descriptor.module.builtIns
        assert(descriptor.typeParameters.size == 1) {
            "Expected only one type parameter for Any?.isArrayOf(), got: ${descriptor.typeParameters}"
        }
        /*TODO original?*/
        val elementType = expression.getTypeArgument(descriptor.original.typeParameters.first())!!
        val arrayKtType = builtIns.getArrayType(Variance.INVARIANT, elementType)
        val arrayType = typeMapper.mapType(arrayKtType)

        return IrIntrinsicFunction.create(expression, signature, context) {
            it.instanceOf(arrayType)
        }
    }
}